Fix mobile tooltip for reaches

[dwreeves]

This is extremely annoying to click out of on a mobile browser:

Can we make this user experience a bit more mobile friendly?

[dwreeves]

Looked into this a little bit. I have no damn idea how to do this for mobile; it seems like a fundamental issue with how phones work with hover objects, and it seems like a heavily involved Javascript thing to resolve this in a nice way. One thing I was thinking was that the green dot could instead reveal a drop down that's embedded (not floating above everything else) and reveals the boathouses. Dunno.